I have just tore down the whole front end on my 2001 3500 4x4. Before starting this project I am pretty sure i read every post ever concerning replacing the ball joints. Since I am in this far I thought I would replace the axle seals since the drivers side has been leaking for at least a year. I just popped out the drivers side seal and really had a hard time getting it out becauce of a metal cone shaped piece on the outboard side of the seal. I havnt seen this piece in any of the pics I have seen. Is this piece part of the seal or is it a depth stop for the seal? Any help would be greatly appreciated. .